Door-operating mechanism



'Nov. 22,A 1927.

' A P. R. DOBSON DooR OPERATING MEGHANISM 4 Sheets-Sheet l Filed Sep't.13, 1926 lNvENw-ow. PEPCY l?.l DOBsoN.

v l fi 'WW/f Nov. 22, 1927.

1,650,332 P. R. DoBsoN A DOUR OPERATING MECHANISH Filgd sept. 13, 1926 4sheets-sheet 2 :5 INVENTOQ. PEPCY P.DOB5ON\ Nov. 22, 1927.

lP. R. DOBSON DooR oPERAT'mG MECH/misa Filed sept. 15, 1926 4sheets-sheet 4 lNvENToQ. PERcv p. Dobson.

2 Les will engage With the wheels of the'vehicle causing the shaft 33 torotate moving the shaft 31 forward and through-the gears and 24 rotatingthe shaft 26 to close the doors 11 and 12. At the same time the shaft 23will move outwardly rotating the shaft 15 to cause the trip crank 19 toassume a vertical position and at the same time to cause the trip 18 to`assume 4a laying position Which is reversed when crank 34 is forceddovvn and back to open the coors thus action is Wheel of the vehiclewhen it emerges from the garage to tip 19 upright, so front Wheels Willengage with 19 and close the doors and lock them.

The crank members 34 and 18 kare spring actuated as at and 51 by springs36 and 50 on the shafts 33 and 15 to retain them in nor- Y mal uprightposition and crank 19 to right Y open the doors.

l plied to doors in angles to crank 18. The collar 20 is provided Withrecesses as at 37 to engage with the securing pin 21 for holding thecollar on the shafts 33 and 15 and permitting them to rotate apredetermined distance to retain the trip cranks 34 and 19 is rotatedby'gears 24 and 25, more than half a circle, 27 and beyond and 28 areconnected thus changing the position of cranks 28 from beyond one deadcenter to to doors 11 and 12, b pitmen 29 and 30. From this it will beseentliat a' push or pull action on pitinen 29 and 30 caused by thedoors will not rotate shaftr26 or cranks 27 and 28-ivhich are y beyonddead centre and form the lock.

In Figure 9, is disclosed as at 39, on the gear 24, a rubber cushion orpad to prevent shock and breakage. shown in Figure 10 is lapplied tosliding roller garage doors and is operated through gears 24 and 25, toshaft 26 is attached a sheeve 42, instead of hinged doors `previouslyreferred to, and consists of a sheevek40 attached to a door jamb and acable or ro e 41 travelling thereof and attached to as eeve 42 and tothe doors at 43 and 44 and passing over the sheeve 40. The sheeve 42 inoperationis rotated, VWinding the cable 41 on one side and unvvindingit. on the .otherside to To close the doors the above action is merelyreversed.

In Figure 11 my device is shown as apunder ordinary circumstances thedevice would obstruct traffic In thismodified caused by cable 46,19 isthen ready for engagement With thev rear:

in upright position. Without moving thecranks 32 and22 and' the oppositedead center, cranks 27,.

being exertedto rotate The modified form a narrow alley Way Where.

desa

form the spring actuated trip crank 34 is used inside and outside thegarage thus eliminating the cranks 1 8 and 19 so that, as shown by thelines in Figure 2 a car driving up the alley Way passes over the outsidecrank 13 forcing it down Without affecting the doors. .The car is thenbacked over the same crank K forcing it back dovvn thus rotating thegears 24 and 25 to open the doors. Vhen the car is backed out of thegarage it is driven over the crank closing the doors and locking them.

As many changes could be made in the above l construction and manyapparently widely different embodiments of my invention Within-the scopeof the claims, constructed Without departing from the spirit or scopethereof, it is intended that all matter contained in the presentspecification and accompanying drawings shall be interpreted asillustrative and not in a limiting sense;

Vhat I claim as my invention is:

1. In mechanism of .the character described the combination with a doorfor a garage or the like of avertical shaft having a gear thereon,crank. arms connecting vthe shaft with the door and means for rotatingthe shaft at a distance therefrom, comprising a rotatably mounted gearadapted. to mesh with the gear on the shaft, a rotatably mountedhorizontal shaft, a trip member keyed on said shaft, a rod connectingthe second gear with said shaft whereby,l on pressure being exerted onthe trip member, thehorizontal shaft is rotated to'rotate the verticalshaft to open or close the door.

2. In a device of the character described and in combi-nation with adoor, a shaft having a gear thereon, crank arms rigidly connecting`thedoor -With said shaft, a second Y lgear adapted to mesh with theaforementioned gear to yrotate the shaft, link rods connecting thesecondgear vvith each of said shafts, crank arms rigidly mounted on thehorizontal shafts and the vertical shaft to open and close the door.

3. Ina device of the character described, a rotatably mounted horizontalshaft, a crank rigidly mounted sleeve on said shaft, a pin adapted toengage With the shaft and Withthe slots in the sleevel to `permitpartial rotation of the sha-ft. a vertical shaft having a gear thereonand a gear rotatably mountedto mesh With said gear and a rod connectingthe sleeve on the first mentioned shaft with the second mentioned gear.

4. In automatic door opening and closing mechanism of the characterdescribed,v

adapted, on pressurethereon, a slottedl on said shaft, spring actuatingmeans for -said crank to normally hold it in a vertical position,whereby, on the crank being pressed to a horizontal position the shaftis rotated and on the pressure being released the shaft automaticallyreturns to its normal position, mechanism operatively connecting theshaft with the door and means provided on the shaft associated with theconnecting means whereby the shaft on being released is adapted topartially rotate Without operating the means connecting means.

In witness whereof I have hereunto set my hand.

PERCY ROBERT DOBSON.

it to the'door operating

